<template>
  <div>
    <el-row type="flex" justify="end">
      <el-select
        v-model="currentYear"
        size="small"
        style="width: 120px"
        @change="dateChange"
      >
        <el-option v-for="item in yearList" :key="item" :label="item+'年'" :value="item" />
      </el-select>
      <el-select
        v-model="currentMonth"
        size="small"
        style="width: 120px; margin-left: 10px"
        @change="dateChange"
      >
        <el-option v-for="item in 12" :key="item" :label="item+'月'" :value="item" />
      </el-select>
    </el-row>

    <el-calendar v-model="currentDate" :first-day-of-week="7">
      <template #dateCell="{data, date}">
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
    <!-- <el-row type="flex" justify="end">
      <el-select v-model="currentYear" size="small" style="width: 120px" @change="dateChange">
        <el-option v-for="item in yearList" :key="item" :label="item" :value="item">{{ item }}</el-option>
      </el-select>
      <el-select v-model="currentMonth" size="small" style="width: 120px;margin-left:10px" @change="dateChange">
        <el-option v-for="item in 12" :key="item" :label="item" :value="item">{{ item }}</el-option>
      </el-select>
    </el-row>
    <el-calendar v-model="currentDate">
      <template v-slot:dateCell="{ date, data }" class="content">
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar> -->
  </div>
</template>

<script>
export default {
  filters: {
    getDay(oldVal) {
      // 2021-05-18
      // 2021-05-08
      const dayStr = oldVal.split('-')[2]
      // startsWith校验字符串是否以给定的字符开始
      return dayStr.startsWith('0') ? dayStr.substr(1) : dayStr
    }
  },
  data() {
    const now = new Date()
    const month = now.getMonth() + 1
    const year = now.getFullYear()
    return {
      currentDate: now,
      currentMonth: month,
      currentYear: year,
      yearList: []
    }
  },
  created() {
    this.yearList = this.getYearList()
  },
  methods: {
    getYearList() {
      const yearList = []

      for (let index = 0; index < 11; index++) {
        yearList.push(this.currentYear - 5 + index)
      }
      // [2016,2017,2018,2019,......]
      return yearList
    },
    dateChange() {
      // 用年月组成新日期, 填入 this.currentDate
      const newDate = `${this.currentYear}-${this.currentMonth}`
      this.currentDate = new Date(newDate)
    },
    isWeek(currentDate) {
      console.log(currentDate)
      return currentDate.getMonth() + 1 === this.currentMonth &&
        (currentDate.getDay() === 6 || currentDate.getDay() === 0)
    }
  }
}
</script>

<style  scoped>
  ::v-deep .el-calendar-day {
    height: auto;
  }
  ::v-deep .el-calendar-table__row td,
  ::v-deep .el-calendar-table tr td:first-child,
  ::v-deep .el-calendar-table__row td.prev {
    border: none;
  }
  .date-content {
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 14px;
  }
  .date-content .rest {
    color: #fff;
    border-radius: 50%;
    background: rgb(250, 124, 77);
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
    font-size: 12px;
    margin-left: 10px;
  }
  .date-content .text {
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
  }
  ::v-deep .el-calendar-table td.is-selected .text {
    background: #409eff;
    color: #fff;
    border-radius: 50%;
  }
  ::v-deep .el-calendar__header {
    display: none;
  }
</style>
